Rewrite the README to describe FRP and RAC in detail
Remove problematic parens from a URL
Fix a few typos and clarify a point
Update login example to reflect the removal of RACMaybe
Make some clarifications based on feedback from @jspahrsummers
Merge the "Examples" section into the other code samples and add detail
Minor proofreading, code style fixes, and line wrapping
Unify the location of footnotes and add a Documentation link
Merge branch 'master' into detailed-readme

Conflicts:
	README.md
Link to the license file
Merge branch 'detailed-readme' (pull request #293)